Just to follow up my previous post, everything was overtaken by events.
I found silver ntl/telewest remote controls on eBay for £2.50!! So decided to go down the digiEye route rather than RedEye.
I didn't need the extra functionality of a programmable remote, and the silver one also controls TV volume.
Sorry Mike!! but I'm sure your product is also v. good. :o
My problem of getting RF signals via the cable connection was solved by a VERY HELPFUL forum member!
Thanks Ntltech32 it's really good to get help when you need it.